Loose-leaf book.



- No. 767,940. PATENTED AUG. 16, 1904- Q P. GRIMM'B. I

LOOSE LEAP BOOK.

APPXQIOLTIO! FILED AUG. I4, 1008.

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4 Patented August 16, 1904.

-UNITED STATES PATENT OFFICE.

FREDERICK (iRIMME, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TOALEXANDER A. \VHAMOXI), OFCHIOAGO, ILLINOIS.

LOOSE-LEAF BOOK- SPECIFICATION forming part of Letters Patent No. 767,940, dated August 16, 1904.

Application filed August 24, 1903. Serial No. 170,637. No model.) I

To all whom, it may RUIZ/0077b.

. tween a roller and a flat surface or between Be it known that I,FREDERICK GRIMBIE, a flat surfaces'and I do not confine myself to Icitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Loose-Leaf Books, of which the following is a specification.

This invention relates to ledger and other books made of loose leavesheld in binderframes.

The object of the invention is to provide a loose leaf book with leaveswhich will fit snugly together at their bound edges when the book isopened and at the same time spring up like a spring-back bound book andlie open flatly; and a further object is to strengthen the leaf at itsbinding edge.

In the accompanying drawings, illustrating one embodiment of myinvention, Figure 1 is a plan view of a leaf of my improved book,showing the invention. Fig. 2 is an enlarged sectional view on the line2 2 of Fig. 1.

Referring to the drawings, 10 designates a leaf provided with T-slot-s11, by means of which it can be threaded on tapes or other means forholding it in a binder-frame. The invention is not in any respectlimited to ledger-leaves or to leaves provided with binding slots orperforations of any particular character, and it will be understood thatin these respects the drawings simply illustrate one kind 'of leaf inwhich the invention may be embodied. The binding edge of the leaf isreduced in thickness at- 12, preferably by compressing or flattening itin any suitable manner, and this reduction of the thickness of the leafpreferably extends from its bound edge up to the bindingopenings. I mayreduce the thickness of the leaf by removing a portion thereof on one orboth sides of the leaf; but to avoid weakening the leaf in any way and,in fact, to strengthen it I prefer to eifect this reduction bycompressing the binding edge of the leaf. This may be ccomplished 1n avariety of waysbetween rollers or beany particular method or means forreaching this result. I also prefer to score the leaf at 13 adjacent tothe binding edge and partly on one side and partly on the other, so thatthe leaf will readily bend in either direction. \Vhile I prefer torender the leaf flexible by scoring, it is apparent that this can beeffected in other ways without departing from my invention. For somepurposes the reduction in the thickness of the leaf may be carried to agreater or less extent across the leaf; but for ordinary purposes Iconsider it sufiicient to carry it up to or midway of thebindingpenings.

A loose-leaf book made up of leaves having their bound edges reduced inthickness, as herein described, will have a stub end which will readilycompress when the book is opened, so that the stub end may spring uplike a spring-back book without separating at the points of binding andpermit the leaves to open and lie flat. 'hen the reduction is effectedby compression, the leaf will then be made denser and stronger, whichprevents-it from tearing or pulling off the binding devices easily andgreatly promotes its utility.

\Vithout limiting myself to the exact construction heretofore described,and illustrated in the drawings, what I claim, and desire to secure byLetters Patent, is'

l. A book composed of a plurality of leaves bound together near oneedge, said leaves being of less thickness behind the bindingmeans thanin front thereof.

2. A book composed of a plurality of leaves bound together near oneedge, said leaves being reduced by compression to less thickness behindthe binding means than in front thereof. Y

3. A book composed of aplurality of leaves each provided with openingsnear one edge to receive the binding means and reduced in thickness backof said openings.

4. A book composed of a plurality of leaves thickness back of saidopenings and rendered having theirdbinclling eiljges reduced in tl(1llClfiexiblefin front thereof. ness and ren ere fiexi c in front of sai rerduccd portion FREDERILlx GRIMME.

5. A book composed of a plurality of leaves each provided with openingsnear one edge to receive the binding means and reduced in \Vitnesses:

WM. 0. BELT, ALEX. A. \VHAMOND.

